See also: List of individual Chromium isotopes (and general data sources).
General data
Name of the isotope:Chromium-63; Cr-63Symbol:63Cr or 6324CrMass number A:63 (= number of nucleons)Atomic number Z:24 (= number of protons)Neutrons N:39Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.625 (= neutron-proton ratio)Neutron excess (N-Z):15Isotopic mass:62.96134(38) u (atomic weight of Chromium-63)Nuclide mass:62.9481744 u (calculated nuclear mass without electrons)Mass excess:-36.01156 MeVMass defect:0.564392492 u (per nucleus)Nuclear binding energy:525.72821994 MeV (per nucleus) 8.34489238 MeV (average binding energy per nucleon)Separation energy:SN = 3.18(39) MeV (first neutron) SP = 17.82(47) MeV (first proton)Half-life:129(2) msDecay constant λ:5.373233957829 s-1Specific activity α:5.139403200512 × 10+22 Bq g-1 1389027892030.5 Ci g-1Spin and parity: (nuclear angular momentum)1/2-Year of discovery:1992
Radioactive Decay
Half-life T½ = 129(2) ms respectively 1.29 × 10-1 seconds s.
The following table shows the atomic nuclei that are isotonic (same neutron number N = 39) and isobaric (same nucleon number A = 63) with Chromium-63. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
